Washington's Birthday, also known as Presidents' Day, is a federal holiday held on the third Monday of February. The day honors presidents of the United States, including George Washington, the USA's first president. George Washington was the first president of the United States of America.
Complement component 5 is a protein that in humans is encoded by the C5 gene.Complement component 5 is involved in the complement system. It is cleaved into C5a and C5b: 1  C5a plays an important role in chemotaxis.2  C5b forms the first part of the complement membrane attack complex.omplement component 5 is the fifth component of complement, which plays an important role in inflammatory and cell killing processes.
One of the hallmarks of lupus are low Complement 3 (C3) and Complement 4 (C4) levels. Low C3 is not specific to lupus; low C3 combined with low C4 is what is usually seen in lupus. The patientâs levels of C3 and C4 can indicate the activity of the disease. 1  When C3 and C4 levels are low, it can suggest that the disease is active and there is either a current flare or a flare is imminent.